Influence of stabilizers on photo-oxidative degradation of SWy-1/poly (ethylene oxide) composite films

被引：2

作者：

Lombardo, Patricia Coelho ^{[1
]}

Poli, Alessandra Lima ^{[2
]}

Schmitt, Carla Cristina ^{[2
]}

机构：

[1] Univ Sao Paulo, Escola Engn Sao Carlos, Dept Mat Engn, Sao Carlos, SP, Brazil

[2] Univ Sao Paulo, Inst Quim Sao Carlos, Sao Carlos, SP, Brazil

来源：

POLIMEROS-CIENCIA E TECNOLOGIA | 2015年 / 25卷 / 01期

关键词：

poly (ethylene oxide); montmorillonite; photostabilizers; photooxidative degradation; WATER-SOLUBLE POLYMERS; POLY(ETHYLENE OXIDE); POLYPROPYLENE/MONTMORILLONITE NANOCOMPOSITES; OXIDATIVE-DEGRADATION; UV-IRRADIATION; PHOTODEGRADATION; CLAY; PHOTOTRANSFORMATION; MONTMORILLONITE; BLENDS;

D O I：

10.1590/0104-1428.1604

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(ethylene oxide) (PEO) with SWy-1 montmorillonite and stabilizers (2-hydroxybenzophenone and tinuvin 770) composites were prepared by intercalation in solution method. The films of the composites were exposed to UV irradiation. The photodegradation products were monitored by FTIR (Fourier Transform Infrared Spectroscopy) and SEC (Size Exclusion Chromatography) method. The PEO pure showed higher degradation rate coefficients, k(d), compared to the others samples. The system that showed the lowest value for the degradation rate coefficients (k(d) = 1.9 x 10(-6) mol g(-1) h(-1)) was the PEO/SWy-1 5% composite with 0.25% of tinuvin 770. In this case, the stabilization of the PEO matrix can be attributed to clay associated with tinuvin 770. The clay scatters and absorbs UV irradiation and tinuvin acts as a stabilizer of the HALS (hindered amine light stabilizers) kind.

引用

页码：101 / 108

页数：8

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